/* 登录注册门户 */
.portal-wrap{
  min-height:calc(100vh - 2rem);
  display:flex;flex-direction:column;justify-content:center;align-items:center;
  padding:2rem 1rem;
}
.portal-card{
  width:100%;max-width:420px;padding:2.4rem 2rem;
  background:linear-gradient(160deg,rgba(26,15,46,.95),rgba(42,27,71,.92));
  text-align:center;
}
.portal-seal{
  width:72px;height:72px;margin:0 auto 1rem;border-radius:50%;
  background:conic-gradient(from 0deg,var(--c-gold),var(--c-blue),var(--c-gold-light),var(--c-gold));
  box-shadow:0 0 30px rgba(212,175,55,.5);
  animation:spin 8s linear infinite;
  position:relative;
}
.portal-seal::after{
  content:"炼";position:absolute;inset:6px;border-radius:50%;
  background:var(--c-purple-deep);color:var(--c-gold-light);
  display:flex;align-items:center;justify-content:center;
  font-size:1.6rem;font-weight:900;
  animation:spin 8s linear infinite reverse;
}
.portal-title{
  font-weight:900;letter-spacing:6px;margin-bottom:.2rem;
  background:linear-gradient(90deg,#fff,var(--c-gold-light),var(--c-gold));
  -webkit-background-clip:text;background-clip:text;color:transparent;
}
.portal-sub{color:var(--c-text-dim);letter-spacing:2px;margin:0}
.portal-footer{color:var(--c-text-dim);font-size:.8rem;margin-top:1.5rem;letter-spacing:1px}